Ran a new best 1/4 mile time of 11.59 @ 118.63 MPH!

[10SecS4]

I went back to the track last night and ran a new best of 11.59 @ 118.63 MPH. Changes I made since last time include more optimized tuning and the addition of a 2-step rev limiter. The 2-step lets me come out of the hole a bit harder and much more consistent. I was cutting 1.65 to 1.68 60fts all night!

I have a couple new ideas that I'm going to put to the test this week. My goal is to knock off the world's quickest RS6 which has ran an 11.438 @ 127.940 (http://www.dragtimes.com/Audi-RS-6-Timeslip-15561.html). Located in Finland, that RS6 has modified turbos, modified intercoolers, nitrous oxide, etc. If I can best his time with my RS6 which has only 2 modifications, I'd be elated. :addict:

You can read more about my RS6 and the mods that I have in my other thread located here:

http://www.rs6.com/forum/showthread.php?t=17986

Here's the timeslip:

http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

[SAFE4NOW]

I went back to the track last night and ran a new best of 11.59 @ 118.63 MPH. Changes I made since last time include more optimized tuning and the addition of a 2-step rev limiter. The 2-step lets me come out of the hole a bit harder and much more consistent. I was cutting 1.65 to 1.68 60fts all night!

I have a couple new ideas that I'm going to put to the test this week. My goal is to knock off the world's quickest RS6 which has ran an 11.438 @ 127.940 (http://www.dragtimes.com/Audi-RS-6-Timeslip-15561.html). Located in Finland, that RS6 has modified turbos, modified intercoolers, nitrous oxide, etc. If I can best his time with my RS6 which has only 2 modifications, I'd be elated. :addict:

You can read more about my RS6 and the mods that I have in my other thread located here:

http://www.rs6.com/forum/showthread.php?t=17986

Here's the timeslip:

http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)


I may have missed this elsewhere in other post, but... how much weight have you ( or do you ) remove from the car when running at the track?

These are very impressive numbers!

Steve

[10SecS4]

Thanks a lot!

To answer your question, copied and pasted from my previous thread:

"My race weight with me in it was 4357lbs. That included my helmet, laptop, misc. tools (just in case), and a few other items. I did, however, remove the small inflatable, donut sized spare and portable air compressor. I believe both of those combine to weigh somewhere around 50lbs."
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

[SAFE4NOW]

Thanks a lot!

To answer your question, copied and pasted from my previous thread:

"My race weight with me in it was 4357lbs. That included my helmet, laptop, misc. tools (just in case), and a few other items. I did, however, remove the small inflatable, donut sized spare and portable air compressor. I believe both of those combine to weigh somewhere around 50lbs."
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)


You should consider coming down to the Texas Mile in the Fall, your car would do really well and get alot of attention IMO!

Steve

[DHall1]

Never been to that event but I can imagine a sea of purpose built race cars that are 2000lbs soaking wet. I dont think our Quattro beasts are in a favorable element.

Mulholland was another story. We rocked! :rs6kiss:


You should consider coming down to the Texas Mile in the Fall, your car would do really well and get alot of attention IMO!

Steve

[DuckWingDuck]

Dave, our car exists somewhere in the middle. In Mulholland, the little cars were zipping away from us on the twisties. On this flat straight course, we would kill the little cars.

And I suspect that much like the salt flats in Utah, there are all sorts of different people out there.

[DHall1]

I should clarify.

Yes, there were sections of Mulholland that were very tight. Still I enjoy driving on those conditions 10 times more than going in a straight line for 1 mile. It may be more like 100 times more.

The straight line just does nothing for me.


Dave, our car exists somewhere in the middle. In Mulholland, the little cars were zipping away from us on the twisties. On this flat straight course, we would kill the little cars.

And I suspect that much like the salt flats in Utah, there are all sorts of different people out there.

[Ruergard]

Congratulations!

Impressive performance for those small changes. Good luck on reaching your goal! :thumb:

[FLACO X3]

stop tempting me to buy a RS 6 :D

[DHall1]

You have quite the selection right now. Several listed along the front range from 25k up.


stop tempting me to buy a RS 6 :D

[p3u]

Amazing time! With a full exhaust and non winter tires what do you think is possible? Low 11's?

[DHall1]

Cat back exhaust on this car makes little difference in HP. HP=the same=same times.

The big HP gains are the downpipes because of the somewhat restrictive cats. He has already gutted the downpipes=more hp gains and lower times.

Tires....no HP difference again. Other than ride or handling quality...tires make no difference in 1/4mi time.

IMHO

Horsepower output makes the time difference. Make more HP....lower time and increase mph.

If you plug in the current 1/4mi times to any HP calculator....the car is already making 600hp/crank. I dont think you can expect much more??


Amazing time! With a full exhaust and non winter tires what do you think is possible? Low 11's?

[10SecS4]

Amazing time! With a full exhaust and non winter tires what do you think is possible? Low 11's?My RS6 already has gutted pre-cats. Gutting those were worth approx. 1 tenth and 1 MPH in the 1/4 mile. The factory catback flows really well, so there isn't much to be gained there.

Right now I'm spinning through all of 1st gear at the track. With sticky tires, I think I could get the 60ft down to 1.60 to 1.64, which would be good for around a tenth in the quarter.

I think the biggest restriction right now is the turbos. They're just way too small for a 4.2L V8. I'm currently doing research to see if there are any bigger turbos out there that will bolt up to the RS6 manifolds and fit in the stock locations.
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

[p3u]

How much power do you think you are putting out at the crank, and what other tricks do you have to beat that 1/4 mile record?

[SAFE4NOW]

My RS6 already has gutted pre-cats. Gutting those were worth approx. 1 tenth and 1 MPH in the 1/4 mile. The factory catback flows really well, so there isn't much to be gained there.

Right now I'm spinning through all of 1st gear at the track. With sticky tires, I think I could get the 60ft down to 1.60 to 1.64, which would be good for around a tenth in the quarter.

I think the biggest restriction right now is the turbos. They're just way too small for a 4.2L V8. I'm currently doing research to see if there are any bigger turbos out there that will bolt up to the RS6 manifolds and fit in the stock locations.
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

True, sticky compound tires like some Mich PS Cups would do wonders for your 60ft and ET. :0:

Also, if you do find some larger turbos, I'd be willing to hammer out some sheet metal to make them fit ... :lovl:

Steve

[snoopra]

..................I'm currently doing research to see if there are any bigger turbos out there that will bolt up to the RS6 manifolds and fit in the stock locations.
Contact Blouch Turbo and see what kind of HP is possible with a turbine/compressor wheel upgrade (factory turbos machined to fit bigger turbine/compressor wheels)

[nyrs6]

Great runs? Stock torque converter? A couple more of those launches and you will need a new transmission. I know this because with my dads RS6 the car could barely hold up on what our car was making.

We were thinking of getting it rebuild at level 10.

What boost were you running?

[p3u]

What ever you do DO NOT use level 10. Do some research on them form AW, they are a bunch of crooks that do shody work.

[snoopra]

Try IPT Transmissions in NJ. They have a good forum and many stand by their work. I'm sending mine for a complete build when I get someone to pull it:)

[10SecS4]

How much power do you think you are putting out at the crank, and what other tricks do you have to beat that 1/4 mile record?Right now I'm estimating my crank horsepower is in the 550-575 range. That might be a bit on the conservative side, given the 118+ trap speeds and 4300+ pound race weight.

Since winter's over, I'm going to be swapping out my snows for some stickier summer tires soon. I'm hoping that will get my short times into the lower 1.6 range.

I'm also planning on turning up the boost. The problem is it's difficult to hold more than 12psi to redline. I think if K03 or K04 wastegate actuators are used or if the RS6 actuators are tweaked, it may be possible to hold 15psi to redline. That would probably be good for a couple tenths and couple MPH. The only problem is you have to drop the motor even if you just want to adjust the wastegate actuators!


Contact Blouch Turbo and see what kind of HP is possible with a turbine/compressor wheel upgrade (factory turbos machined to fit bigger turbine/compressor wheels)I've talked to them before about the RS6 turbos, but they charge an arm and a leg for their services. Plus, I don't think RS6 hybrids would be much of an improvement on the 4.2L. The big problem, like with most of the KKK series turbos, is the tiny hot sides. I'll probably first try the stock turbos with some K03 or K04 wastegate actuators to see what kind of boost I can then hold to redline.


Great runs? Stock torque converter? A couple more of those launches and you will need a new transmission. I know this because with my dads RS6 the car could barely hold up on what our car was making.

We were thinking of getting it rebuild at level 10.

What boost were you running?Yep, I'm still on the stock and original torque converter, trans, valve body, etc. 94K miles and still going strong.

I'm running 11 to 11.5psi of boost right now. What were you running with the OCT chip?

What kind of transmission software did you have on your dad's RS6? That is the key to making the tranny live. From what I've seen, some tuners are not making the necessary changes that are crucial to ensuring that the tranny holds up to the torque levels that we're seeing. In some cases, you'd even be better off with the factory transmission software!
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

[nyrs6]

Yep, I'm still on the stock and original torque converter, trans, valve body, etc. 94K miles and still going strong.

I'm running 11 to 11.5psi of boost right now. What were you running with the OCT chip?

What kind of transmission software did you have on your dad's RS6? That is the key to making the tranny live. From what I've seen, some tuners are not making the necessary changes that are crucial to ensuring that the tranny holds up to the torque levels that we're seeing. In some cases, you'd even be better off with the factory transmission software!
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

Interesting. We had OCT TCU Upgrade. Once we did the upgrade we were able to get all four wheel to spin but were never able to get a better ET. Even though we were able to lunch alot higher we still could not get any better ET times and the way it felt we though for sure we could get into the 11s but that never happened.

As far as PSI i don't remember how much. Would 13 psi sound about right?

I cant imagine how your car must feel off launch because i know ours felt like our guts were going to come out :hihi: ..... I need a ride lol

Does your tires spin at all?

[p3u]

10secs4,

How much power would you estimate on 93 and on 91?

[DHall1]

Marc,

Glad to see your thoughts on the turbine housings are in line with my idea on restrictions. Backpressure is a bi*ch but can you rely on adding spring pressure to the wastegate actuators to make up for a turbine housing that is too small? The pressure ratio numbers just are not there to maintain that boost level.

And the real world will never see the fruits of the uprated wastegate actuators because each car will need to be custom tuned and the wastegate solenoid dialed in on each car. Its not like we will have the 2D table on our laptop to adjust the duty cycle of our WG solenoid.

:mech:

[10SecS4]

10secs4,

How much power would you estimate on 93 and on 91?525-535. With my tune, the only difference between 91 and 93 is spark advance. That difference is only a couple degrees in the mid-range and up top. This equates to 5-10 HP max.


Marc,

Glad to see your thoughts on the turbine housings are in line with my idea on restrictions. Backpressure is a bi*ch but can you rely on adding spring pressure to the wastegate actuators to make up for a turbine housing that is too small? The pressure ratio numbers just are not there to maintain that boost level.

And the real world will never see the fruits of the uprated wastegate actuators because each car will need to be custom tuned and the wastegate solenoid dialed in on each car. Its not like we will have the 2D table on our laptop to adjust the duty cycle of our WG solenoid.

:mech:I don't think adjusting the wastegate actuators will make a huge difference, nor will it make up for the tiny exhaust housings, but I do think it will give me a shot of holding 14-15psi to redline without the massive taper that I'm seeing now. If I can hold that boost pressure to redline, I estimate another 30-40whp up top.

Most other people won't want to make the kind of mods that I'm starting to make now. The mods I make from this point forward are for my own personal entertainment and to push the limits of the C5 platform/BCY engine. Most of you guys on the forum will be quite content with high 11/low 12 second quarter mile ETs on pump fuel and mid to high 11's on 100-104 octane race fuel. And those results can be achieved with just the ECU/TCU tune. Note: on my RS6, the gutted pre-cats were only worth 1 MPH and 1 tenth in the quarter.
__________________
Marc aka 10SecS4

http://titsup-racing.com/video/rs6/rs6_sig.jpg

2003 Audi RS6
11.59 @ 118.63 | Video (http://www.titsup-racing.com/video/rs6/rs6_11_8.wmv) | Timeslip (http://titsup-racing.com/video/rs6/rs6_11_59_timeslip_resized.jpg)
Mods: No pre-cats & my own custom tuned ECU/TCU. That's it!

2000 Audi S4
10.73 @ 132.76 | Video (http://titsup-racing.com/video/s4/s4_10_73.wmv) | Timeslip (http://titsup-racing.com/images/s4/s4_10_73.jpg)
Mods: K04s + bolt-ons + weight reduction (bone stock motor!)

[BCY4.2]

Keen to see detailed info on your 10.97 pass

[p3u]

10.97 pass? Where was this?

[BCY4.2]

10.97 pass? Where was this?

I was told via a PM, maybe he did a typo?

[p3u]

Well we need some more info. 10secs4 wanna chime in?

[p3u]

10sec, do you also think you could do a run on 91oct at the strip, I would like to see and I'm sure others would as well, what your tune will do on pump gas.

[snoopra]

Blouch Turbo said the upgrade was about $400-$600 each. Output upgrade would be 350hp compared to 240hp OEM (each).